Single Line Dual Source Stacked Exit
One line exits a section from two chained source stations (`a -> b`, both emitting onward) to three stacked downstream sections. The shared exit is a feed-forward chain, so the line leaves on the feeders' row as one horizontal trunk and drops on a single riser in the gap, rather than dragging both feeders into near-parallel diagonals through the section's bottom corner.
Mermaid source
%%metro title: Single-line dual-source stacked exit%%metro line: l | Line | #0570b0
graph LR subgraph src [Source] a[A] b[B] a -->|l| b end subgraph top_sec [Top] t[T] t_up[Up] t_dn[Down] a -->|l| t t -->|l| t_up t -->|l| t_dn end subgraph mid_sec [Mid] m[M] b -->|l| m end subgraph bot_sec [Bot] n[N] b -->|l| n endCLI command
nf-metro render examples/topologies/single_line_dual_source_stacked_exit.mmd -o single_line_dual_source_stacked_exit.svg